This is the adaptable version of the mason jar mug cozy that I sell.
Have you ever been so tired in the morning that even speaking is a chore that you can well do without?
Struggle no more, this mason jar cozy is just what you need. You can pre set your preference in advance and thrust it into the hands of your significant other/child/manservant/helper chimp and let them work it out.
It also has the added bonus of being customisable so that you don't need to use it just for hot beverages. For a small fee, I can supply an extra set of tabs for alcoholic drinks with your own selection on it. 
they all come with a free mason Jar with a sealed lid on it.